Ore-concentrator



' (No Model.) 2 Sheets-Sheet 1.

G. S. BURR.

ORE GONOENTEATOR.

PatntedJan. 3,1882.

fla 81/: aZ/M. 5m M (No ModeL) 2 Sheets-Sheet 2; 7

ms. BURR. ORE GONGENTRAT-OR.

N o. .25 1,828," Patented J'an.3,1882

wile 31/: 11110097101":

time STATES PATENT OFFICE... I

GEORGES. BURR, ()F BREOKINRIDGE, COLORADO.

ORE-CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 251,828, dated January3, 1882;

To all whom it may concern:

Be it known that I, GEORGE S. BURR, of Breckinridge, in the county ofSummit and State of Colorado, have invented certain new and usefulImprovements in Ore-Concentrators, of which the followingis a full,clear, and

. exact description, reference being had to the accompanying drawings,forming part of the same, and in which-- Figure l is aside elevation oftlieconcentrator; Fig. 2, a longitudinal section, and Fig. 3 an endelevation.

My invention relates to ore-concentrators, and has for its object theseparation of gangnes and other foreign matter from the precious metal,whereby results economy in transporting and reducing the ore and in theyield of the precious metal; and it consists in the construction andcombination of means hereinafter particularly described, and then soughtto be specifically defined by the claims.

In the accompanying drawings, the letter A indicates a revolvingcylinder, open at both ends, of the same diameter from end to end ortapering from oneendto the other, and provided internally with a spiralblade, B, running from one end to the other of the cylinder, and adaptedwhen the cylinder is revolved to carry what ore may be placed thereinfrom the introducing-point to the discharging-point. The cylinder isheld by a strap, 0, or other suitable means to a tilting frame, D, thetrunnions E of which rest in the posts F of the base G. The cylinder Ais provided around its exterior, between its ends, with a circumferential gear, H, which is in mesh with thepinion I on the end ofashaft, J, journaled in the boxes K, which are bolted to the top of vone side of frame D. To the other end ofthis shaft there is suitablysecured a bevel-gear, L, which engages with the bevel-gear Mon the shaftN,journaled in boxes 0 (only-' one of which is shown) and operatedby'cranlr P. These gears are for revolving the cylinder A. Anyinclination desired can be given to the cylinder by tiltingthe frame D,which will be held to the inclination by a set-screw,Q, passed into oragainst the side of. the frame through the slotted end of a segment, B,secured at the.

other end to the post F. Any other suitable means than those describedcan be used to re Volve the cylinder, to tilt the frame and holdApplication filed March 21, 1881. (X0 model.)

it to its inclination. A pipe, S, perforated so as to direct wateragainst the side of the cylinder and connected with the source ofwatersupply, is held within the cylinder at one end by an arm, T,extending from one side of the tilting frame D, to which it is bolted,to a point in front of the open end of the cylinder, so as not tointerfere with the rotation of the cylinder.

To serve as frictional supports for the cylinder and as guides for thesame, and which may also aid in holding the cylinder on the frame byfitting into grooves a formed across the exterior of the cylinder, disksor wheels U are bolted or otherwise secured to the ends of the frame D,so as to bear against the outside of the cylinder, and are preferablyjournaled so as to turn.

In operation the broken or pulverized o're,

mixed with gangue and other foreign matter is introduced by means of achute, V, or other suitable means into the lower end of the cylin derwhile the latter is being revolved. It is then taken hold of by thespiral blade B and carried to the upper end of the cylinder. While it isprogressing from the lower end to the upper end it is subjected to theflow of water introduced into the cylinder at its upper end through theperforated pipe or by other means. The water carries off through thelower end of the cylinder the gangue and other foreign matters, whilethe spiral blade carries to the top or upper end of the cylinder theheavier or precious metal freed from the foreign matters. The waterflows between the spirals and'over them from top to bottom; and by themeans described the ore is very thoroughly cleansed or separated fromthe foreign matters.

. Having described my invention, what I claim is- I. An ore'concentratorconsisting of a. revolving cylinder having a spiral blade connected toits inner circumference, and extending from end to end of the cylinder,in combination with means for tilting the cylinder and holdingitto itsadjusted position, substantially as set forth.

2. An oreconcentrator consisting of a re volving and tilting cylinderhaving a spiral blade extending along its inner circumference from oneend to the other of the cylinder, in combination with means for lockingthe cylinder to its adjusted position, and a water-supply adjustablewith the cylinder, so as to maintain its relative position thereto nomatter What the pitch of the cylinder be, substantially as set forth.

3. An ore-concentrator consisting of a revolving cylinder having aspiral blade connected to its inner circumference, and extending fromend to end of the cylinder, in combination with the supporting andtilting frame D, segment R, and a set-screw for locking the parts,substantially as set forth.

4. The revolving cylinder provided with a spiral blade Within itscircumference, in combination with the supporting and tilting frame Dand arm T, connected to the frame and extending to a point in front ofthe cylinder, and supporting the supply-pipe S, whereby the severalparts are adapted to operate as set forth.

In testimony thatI claim the foregoing as my invention I hereunto affixmy signature this 19th day of February, A. D. 1881,

enonen s. BURR. n s]

